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冰川冻土 ›› 1998, Vol. 20 ›› Issue (1): 51-54.

• 研究论文 • 上一篇    下一篇

地下水浅埋条件下越冬期土壤水热迁移的数值模拟

雷志栋1, 尚松浩1, 杨诗秀1, 王义2   

  1. 1. 清华大学水利水电工程系, 北京100084;
    2. 内蒙古水利科学研究院, 呼和浩特010020
  • 收稿日期:1997-09-22 出版日期:1998-02-25 发布日期:2012-04-26
  • 基金资助:
    国家教委博士点基金(9400321)和国家自然科学基金(59669002)项目.

Numerical Simulation on Simultaneous Soil Moisture and Heat Transfer under Shallow Ground Water Table in Winter

LEI Zhi-Dong1, SHANG Song-Hao1, YANG Shi-Xiu1, WANG Yi2   

  1. 1. Department of Tsinghua University, Beijing 100084;
    2. Hydraulic Reasearch Institute of Inner Mongolia, Hohhot City 010020
  • Received:1997-09-22 Online:1998-02-25 Published:2012-04-26

摘要: 应用土壤冻融过程中水热耦合迁移模型,对内蒙古河套灌区地下水浅埋条件下整个土壤冻融过程进行了模拟,分析了越冬期土壤水热迁移规律。结果表明,快速冻结阶段土壤冻结速度随深度线性减小。冻结过程中某一深度处的含水量增量与冻结速度呈双曲线型相关关系。提出了土壤冻融过程中的特征含水量概念,以描述土壤含水量的动态变化特征。

关键词: 土壤冻融, 土壤水热迁移, 特征含水量, 数值模拟

Abstract: Using the model of simultaneo us moisture and heat transfer during soil freezing and thawing, a numerical sumulation is carried out to the whole course of freezing and thawing in Hetao irrigation areas in Inner Mongolia Autonomous Region. Moisture and heat transfer is analyzed based on the simulation. The result shows that freezing speed decreases linearly with soil depth. The increment of water content during soil freezing at a certain depth correlates with freezing speed in hyperbolic style. A concept of typical water content during soil freezing and thawing is proposed to describe the change of water content.

Key words: soil freezing and thawing, simultaneous soil moisture and heat transfer, typical soil water content, numerical simulation

中图分类号: 

  • P642.14